Trigger mechanism for guns



Jul 3, 1924; 15,666

F. BOSTLEY TRIGGER MECHANISM FOR GUNS Filed June 8, 1923 2 Sheena-Sheet l INVENTOR WITNESSES 5/ ATTORNEY July 8, 1924. 1,500,666

' v I F. BOSTLEY 4 TRIGGER MECHANISM FOR GUNS Filed June 8, 1923 Z Shasta-Sheet 2 [A 3 A Fran/ Bmsily INVENTOR 3/ WITNESSES x w BY Patented July 8, 1924..

UNTTED STATES ament eATsNT OFFICE. f

FRANK BOSTLEY, OF SOUTH WILLIAMSPORT, PENNSYLVANIA.

TRIGGER MECHANISM FOR GUNS.

Application filed June 8,

To all whom it may concern:

Be itknown that I, FRANK BOSTLEY, a citizen of the United States, residing at South Williamsport, in the county of 5 Lycoming and State of Pennsylvania, have invented a new and useful Trigger Mechanism for Guns, of which the following is a specification.

This invention relates to a trigger mechiO anism especially adapted for double-barrel shot guns, in which a single trigger may be used in firing either barrel.

The general object of tie invention is to provide a mechanism of simple construction,

15 which may be used in connection with any of the more common types of double-barrel fire arms, and by means of which both barrels may be fired at different times from a single trigger by a simple adjustment,

20 which may be so arranged that either the right hand or the left hand barrel will be fired first, or locked so that neither barrel can be fired.

The invention consists further in various 2 details of construction and combinations of parts which will be more particularly described in connection with the accompanying drawings and subsequently claimed.

In the drawings:

so Figure 1 is a side view of a breech frame embodying my invention, the left hand side plate being removed, and the view being taken substantially on the line 11 of Fig ure 3.

Figure 2 is a similar view, but with the left hand portion of the trigger and hammer mechanism cut away.

Figure 3 is a plan view of the same with the upper tang broken away.

.Figure 4 is a detailed view showing the trigger mechanism and safety lock.

Figure 5 is a view similar to Figure 4, but showing the parts in position for the right hand barrel to be fired first.

Figure 6 is a cross sectional view on the line 6-6 of Figure 3.

Figure 7 is a detailed perspective view of the sear actuating block.

Figure 8 is a detailed perspective View of the spring for holding the parts in adjusted position.

Figure 9 is a detailed view of the shifting lever and safety lock.

The invention is shown in connection with a breech frame 1, having an upper tang 2,

1923. Serial No. 644,126.

and a lower trigger plate 3, which are e onnected at their rear ends by a screw 4 which passes through the stock ofthe gun. A snap lever has an integral downwardly extending post 6 pivoted in the forward part of the frame, which serves as a barrel looking post, the barrel lock being actuated by means of a cam projection secured on said post. Each of the hammers 8 is journalled on a pin 9 extending transversely through the breech frame, and is provided with a notch 10 adapted to be engaged by the forward end of a sear I 11, pivotally mounted on a pin 12, and cooperating with the main spring 13 to hold the hammer cocked. VVhen the sear 11 is rocked in 0pposition to the main spring 13 to release the hammer, the latter is propelled by the force of the main spring against the firing pin 14, in a manner well understood to those skilled in the art. The breech frame has removable side plates 15 and 16, each one of which carries a hammer, sear and main spring, these being retained on the side plate by a bridle 17 Each hammer 8 has an integrally formed heel 18, engageable by a lug 19 on the rear end of a rock shaft 20, which carries at its forward end a wrist-pin 21 engageable by the barrel, whereby when the gun is broken, the shaft will be rocked in a manner to cook the hammers. All the parts thus far described are of common construction. V

In carrying out my invention, the trigger 22, which is pivotally mounted on a pin 23 carried by a trigger block 24 secured to the plate 3, has a rearwardly extending arm 25, and a similar arm 26 is secured inspaced relation thereto by screws 27, or other suitable means. The sears 11 at their rear ends have inwardly projecting pins 29, which in previous constructions are engaged by the respective triggers to release either one or the other, depending upon which trigger is actuated. In the present construction, a block 30 is shown selectively engaging the pins 29 to actuate the firing mechanism, and this block has a downwardly projecting web portion 31, which extends between the arms and 26 and is provided with a perforation 32, in which is secured a pin 33, which is adapted to ride in a slot 34 extending longitudinally of the arms 25 and 26, whereby the block may be'adjusted longitudinally of the trigger to bring it into the desired relation to the sear pins 29, so as to actuate the firing mechanism in the manner which will now be explained.

The upper surface of the block 30, as best shown in Figure 7, has on its right hand side a raised portion 35, and in rear thereof a lower portion 86, while the left hand side has at its forward end a lower portion 37, and at its rear end a raised portion lVhen the parts are in the position shown in Figure 5, the front portions and 37 are in the transverse plane of the sear pins 29, and upon the actuation of the trigger the raised portion 35 will first come into engage ment with the right hand sear pin to fire the right hand barrel, and upon further actuation of the trigger the lower portion 37 will engage'the left hand sear pin to fire the left hand barrel. lVith the parts in the position shown in Figure 2, the rear portions 36 and 38 of the block are in the transverse plane of the sear pins, and upon actuation of the trigger the left hand barrel will be fired first.

For the purpose of adjusting the block 30 longitudinally, the pin 33 is connected by a link 39 to a shifting lever 40, shown in detail in Figure 9. This lever, as will be seen, consists of two arms 41 and 42 connected by a web 43, the arm 41 being pivotally connected at its lower end to the link 39. The lever is intermediately pivoted on a pin 44, which is supported by an upstanding lug 45 from the trigger plate 3, and the arms 41 and 42 straddle this lug. The upper ends of the arms 41 and 42 are connected by a pin 46, which rides in a notch 47 formed in a sliding plate 48, by means of which the lever and block 30 are shifted.

The forward end of the plate 48 is guided in a groove 49 formed in the under side of the tang 2, and the rear portion of the plate extends upwardly through a slot 50 in the tang where it is provided with a thumb piece 51, by means of which it is actuated. The slide plate 48 and the mechanism actuated thereby are held in their adjusted position by a spring 52 secured to the underside of the tang, and provided with branches 53 extending rearwardly on each side of the plate 48, and formed with notches adapted to yieldingly retain'a pin secured to the plate 48. The sides of these notches are sufiiciently curved, so that by a pressure on the thumb piece 51 in either direction, the pin 55 pressing the sides of the notches will cause the Spring to yield to permit the adjustment.

As has been heretofore explained, when the pin 55 is in the rearmost notch 54, as illustrated in Figures 1 and 2, the initial movement of the trigger will cause the surface 38 to engage the pin 29 of the left hand sear to fire the left hand barrel, and upon further actuation of the trigger the surface 36 will engage the pin 29 of the right hand se to fire the right hand barrel. lVhen the pin 55 engages the foremost notch 54, as shown in Figure 5, the initial actuation of the trigger will cause the surface 35 to engage the right hand sear pin, while further actuation of the'trigger will cause the surface 37 to engage the left hand sear pin. When the pin 55 is in engagement with the intermediate notch 54, as shown in Figure 4, a downwardly projecting tongue 56 on the lower end of the lever arm 42 will be in juxtaposition to a rearwardly and upwardly extending tongue 57, on the rear end of the trigger arm 55, and acts as a safety lock.

From the foregoing description, it will be seen that I have devised a simple and inexpensive device which is adapted to be used in'connection with any of the usual types of gun locks, and by means of which the barrels may be separately fired with a single trigger, and by a simple adjustment either barrel may be fired first. All of the usual parts of the trigger mechanism are of the usual construction except the double trigger arms 25 and 26, the sear actuating block 30, and the shifting lever 40. These parts may be manufactured with no more expense than the usual double trigger construction. After one barrel has been fired, the trigger moves freely until the surface 36 or 37, as the case may be, engages the other pin to fire the other barrel.

lVhile l have shown and described in detail the specific structure of the various details which constitute my invention, it will be understood that this is merely for the purpose of illustration, and that various modifications may be made therein within the scope of what is claimed without departing from the spirit of the invention.

What is claimed is:

1. In a trigger mechanism for doublebarreled guns, the combination of a pair of hammers each. having an individual sear and a main sprin operatively associated therewith, a pivotally mounted. trigger having a pair of spaced arms ext-ending rearwardly from its pivot, a block supported by said arms and having a web portion extending downwardly between the arms, a pin and slot connection between the web portion and the arms holding the block in engagement with the upper surface of the arms but permitting longitudinal adjustment thereon, a lever connected by a link to said block,

ieans for rocking said lever to adjust the block longitudinally, said block being operable in one position of adjustment to engage and actuate the sears to release the respective hammers in a certain order, and similarly operable in another position of adjustment to release the hammers in reverse order.

2. In a trigger mechanism for double-barreled guns, the combination of a pair of sears one for each barrel, said sears having inwardly projecting lugs at their rear ends, a pivotally mounted trigger, a sear actuating block mounted for longitudinal sliding movement longitudinally of the trigger, a pivotally mounted lever connected by a link to said block, means for rocking said lever to adjust the block, said block being operable in one position of adjustment by a continuous pull on the trigger to engage the lugs and actuate the sears in a certain order and similarly operable in another position of adjustment to actuate the scars in reverse order, said lever having at one end a projecting tongue, and a cooperating tongue on the trigger operable when the lever is in a third position of adjustment to lock the trigger and to prevent actuation of either sear.

3. In a trigger mechanism for doublebarreled guns, a pair of hammers each having an individual gear and a main spring operatively associated therewith, a pivotally mounted trigger, a block carried by the trigger and longitudinally slidable thereon but held against other movement with respect to the trigger, a pivotally mounted lever connected by a link to said block, means for rocking said lever to adjust the block so that a selected one of the sears will be actuated first thereby, said lever having a downwardly projecting tongue, and the trigger having a rearwardly and upwardly projecting tongue in registry therewith when the lever is in intermediate position to constitute a safety lock.

4. In a trigger mechanism for doublebarreled guns, a pair of sears, one for each barrel, said sears having inwardly projecting lugs, a pivotally mounted trigger having a block for engaging said lugs successively upon a continuous pull of the trigger to operate the respective sears, a pivotally mounted lever connected by a link to said block, aid lever being adjustable to one ex treme position to adjust the block so that the left hand sear will be operated first and adjustable to the other extreme position to adjust said block so that the right hand sear will be actuated first and means on said lever operating as a safetv lock when the lever is adjusted to intermediate position.

5. In a double-barreled gun, the combination of a breech frame, a pair of hammers in said frame each having an individual sear, a main spring operatively associated therewith, said sears having inwardly projecting lugs at their rear ends, a pivotally mounted trigger, a block carried by the trigger in rear of its pivot and slidable longitudinally thereon and adapted to be swung upwardly by a rearward pull on the trigger, portions of the upper surface of the block being higher than other portions, a lever connected by a link to said block, means for rocking said lever to adjust the block to either one of its extreme positions in which either one or the other of the sear lugs will be in the path of a raised portion, while the other sear lug is in the path of a lower portion, whereby a continuous pull on the trigger will first cause the actuation of the first mentioned sear and subsequently the actuation of the last mentioned sear, said lever having a downwardly projecting tongue, and the trigger having a rearwardly and upwardly projecting tongue in registry therewith when the lever is in intermediate position to constitute a safety lock.

6. In a double-barreled gun, the combination of a breech frame having a pair of hammers, an individual sear disposed in operative relation to each hammer, a main spring for each hammer, said sears having inwardly projecting lugs at their rear ends, a pivotally mounted trigger having spaced arms within the breech frame, a block having a downwardly projecting flange extending between said arms and having a longitudinally slidable connection therewith and adapted to be swung upwardly by a rearward pull on the trigger, portions of the upper surface of the block being higher than others, a double arm lever intermediately pivoted to the frame, a link connecting one arm of the lever to the block, and means for rocking said lever to adjust the block to either one of its extreme positions in which either one or the other of the sear lugs will be in the path of a raised portion, while the other sear lug is in the path of a lower portion, whereby a continuous pull on the trigger will first cause the actuation of the first mentioned sear and subsequently the actuation of the last mentioned sear, the other arm of said lever having a downwardly projecting tongue, and a trigger having an up wardly projecting tongue which is in registry therewith when the lever is in intermediate position, thereby constituting a safety lock.

In testimony, that I claim the foregoing as my own, I have hereto affixed my signature.

FRANK BOSTLEY. 

